Demulsifiers for separating oil and water mixtures

US6172123A · kind A · utility

Assignee

• Henkel Limited

Inventors

• Andreas Lindert · Troy, US
• Michael S. Wiggins · Lansdale, US

Key dates

• Filing date: Jul 30, 1999
• Grant date: Jan 9, 2001
• Expiry date: Jul 30, 2019

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S507/921
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A method for preventing or breaking oil and water mixtures comprising adding thereto a branched reaction product of PA0 A) at least one linking compound of formula I EQU R.sup.1 (X).sub.3 (I) PA1 wherein each X group is a halogen atom or one X group is a halogen atom and two X groups with two adjacent carbon atoms in the R.sup.1 group and an oxygen atom from an epoxy group, and R.sup.1 is an alkanetriyl group containing from 3 to 10 carbon atoms; PA0 B) at least one compound of formula II and/or formula III EQU R.sup.2 (OA).sub.n OH (II) PA1 wherein R.sup.2 is an aliphatic group containing from 3 to 36 carbon atoms, n is a number of from 0 to 200, and each OA group is independently an ethyleneoxy, 1,2-propyleneoxy, or 1,2-butyleneoxy group. EQU R.sup.2 (OA).sub.n NH.sub.2 (III) PA1 wherein R.sup.2, OA, and n have the meanings given above for formula II; and, optionally, one or more of the following components; PA0 C) a polyol containing at least 2 hydroxyl groups, one or more of which can be optionally alkoxylated; and PA0 D) a polyamine containing at least two amine groups, e.g. 2, 3, 4, 5 or 6 amine groups or more, and which can optionally contain alkyleneoxy groups.